The cells contain nucleus and membrane bound organelles.
It can be single celled or multicellular.
Most eukaryotic cells contain mitochondria.
Mitochondria are called the powerhouse of the cell.
The main function of mitochondria is to produce large amounts of energy in the form of ATP (Adenosine triphosphate), which is essential for carrying out various metabolic functions.
It also helps in calcium homeostasis and regulate innate immunity.